1. Palliative Care program SAMO, Palermo, Italy;
2. Department of Sciences for Health Promotion and Mother Child Care, University of Palermo, Italy;
3. Department of Biopathology, Medical and Forensic Biotechnologies (DIBIMEF), Section of Anesthesia, Analgesia, Intensive Care and Emergency, Policlinico “P, Giaccone”, University of Palermo, Italy